Cannot create Atlantic Standard Time Zone, instead the timezone ID of AST creates Alaska Time Zone.  

Steps to reproduce:
Compile and run the attached java code

import java.util.TimeZone;

public class tz {
    static final int millisInHour = 3600000;
    public static void main( String argv[] ) {

        TimeZone tz1 = TimeZone.getTimeZone( "AST" );
        if( tz1 == null ) {
            System.out.println( "Time zone is null" );
        }
        else{
            System.out.println( "Offset: " + 
                                tz1.getRawOffset()/ (double)millisInHour );
            System.out.println( "Should be -4" );
        }
        
    }
}